Mozilla launches Firefox 4 beta 4, rolls in Sync, Panorama tab manager

Mozilla Tuesday updated Firefox 4 to its fourth beta release, adding two major new features: Firefox Sync and Panorama. Firefox Sync lets users access browser history, password keychain, bookmarks, and open tabs across their different desktop computers, iOS, or Maemo-based mobile devices. Sync is available as an add-in for Firefox 3.5 and 3.6, but in Firefox 4, it is a built-in feature.